Kia Sportage: Heater / PTC Heater Description and operation

The PTC (Positive Temperature Coefficient) heater is installed at the exit or
the backside of heater core.

The PTC heater is an electric heater using a PTC element as an auxiliary heating
device that supplements deficiency of interior heat source in highly effective
diesel engine. The electric heater heats up the interior by directly heating
the air that passes through the heater. The name itself implies that the element
has a proportional resistance change sensitive to temperature.

Other information:

Description
•
The inhibitor switch is installed on top of transaxle, and is connected
to the shift lever by a shift cable.
•
Inhibitor switch signals (S1, S2, S3, S4) are transmitted to the TCM
according to the driver' ...